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pwm申请失败！
发表于 2016-3-25 14:17:44
浏览：7965
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回复：4
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楼主
大神帮俺看看，pwm也是按照官网上配置的，但那时申请出错。
pwm1 = pwm_request(1,"backlight_pwm");
if(IS_ERR(pwm1))
{
printk("1111111111111111111\n");
return -1;
}
pwm_config(pwm1,25000,50000);
pwm_enable(pwm1)
这是写在驱动里的代码，
&pwm1 {
compatible = "rockchip,rk-pwm";
reg = <0xff680010 0x10>;
#pwm-cells = <2>;
pinctrl-names = "default";
pinctrl-0 = <&pwm1_pin>;
clocks = <&clk_gates11 11>;
clock-names = "pclk_pwm";
status = "okay";
};
上面是注册到firefly-rk3288.dts的代码，
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